Idiopathic incompetence of the venous pump of the calf.
D000293:Adolescent; D000328:Adult; D001794:Blood Pressure; D003490:Cyanosis / Q000150:complications; D004487:Edema / Q000150:complications; D005260:Female; D006801:Humans; D007866:Leg / Q000098:blood supply*; D010146:Pain / Q000150:complications; D010690:Phlebography; D014648:Varicose Veins / Q000150:complications; D014652:Vascular Diseases; D014680:Veins